According to the U.S. Census Bureau, 10% of adults 25 years and older in the United States had advanced degrees in 2009. A researcher with the U.S. Department of Education surveys 500 randomly selected adults 25 years of age or older and ﬁnds that 60 of them have an advanced degree. Explain why this is not necessarily evidence that the proportion of adults 25 years of age or older with advanced degrees has increased.
Answer to relevant QuestionsDuring the course of a typical season, suppose a batter has 500 at-bats. This means the player has the opportunity to get a hit 500 times during the course of a season. Further, suppose a batter is a career 0.280 hitter (he ...Peanut and tree nut allergies are considered to be the most serious food allergies. According to the National Institute of Allergy and Infectious Diseases, roughly 1% of Americans are allergic to peanuts or tree nuts. A ...Determine µx̄ and σx̄ from the given parameters of the population and the sample size. µ = 27, σ = 6, n = 15 The upper leg length of 20- to 29-year-old males is normally distributed with a mean length of 43.7 cm and a standard deviation of 4.2 cm. (a) What is the probability that a randomly selected 20- to 29-year-old male has an ...The amount of time Americans spend watching television is closely monitored by ﬁrms such as A. C. Nielsen because this helps to determine advertising pricing for commercials. (a) Do you think the variable “weekly time ...
Post your question